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ASTM D3370-25

Current Revision

Standard Practices for Sampling Water from Flowing Process Streams

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1.1 These practices cover the equipment and methods for sampling water from flowing process streams such as process streams at power stations for chemical, physical, microbiological, and radiological analyses. It does not cover specialized equipment required for and unique to a specific test or method of analysis. The following are included:

 

Sections

 

 

Practice A—Grab Samples

9 – 17

Practice B—Composite Samples

18 – 23

Practice C—On-Line Sampling

24 – 29

1.2 For information on specialized sampling equipment, tests or methods of analysis, reference should be made to Volumes 11.01 and 11.02 of the Annual Book of ASTM Standards, relating to water.

1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazards statements, see 8.3 and 13.4.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 The goal of sampling is to obtain for analysis a portion of the main body of water that is representative. The most critical factors necessary to achieve this are points of sampling, and materials selection, system design, time of sampling, frequency of sampling, and proper procedures to maintain the integrity of the sample prior to analysis.

5.2 Homogeneity of the process to be sampled is frequently lacking, necessitating multiple-point sampling. If it is impractical to utilize a most-representative sampling point, it may be necessary to determine and understand interrelationships so that results obtained at a minimum number of points may be used to characterize the system.

5.3 Samples collected from a single point in a system are always recognized as being non-representative to some degree. For this reason, total representativeness of samples cannot be a prerequisite to the selection of a sampling point. The degree of representativeness of the sample shall be assessed and the assessment made a part of the permanent record. This will prevent an artificial degree of accuracy from being assigned to the data derived from tests on the sample.

5.4 The samples shall be of sufficient volume and shall be taken frequently enough to permit reproducibility of testing requisite for the desired objective, as required by the method of analysis to be used.

5.5 Laboratories or facilities conducting water sampling should be in compliance with Guide D3856.

SDO ASTM: ASTM International
Document Number D3370
Publication Date Jan. 1, 2025
Language en - English
Page Count 13
Revision Level 25
Supercedes
Committee D19.03
Publish Date Document Id Type View
Jan. 1, 2025 D3370-25 Revision
Dec. 15, 2018 D3370-18 Revision
Dec. 1, 2010 D3370-10 Revision
Oct. 1, 2008 D3370-08 Revision
Dec. 1, 2007 D3370-07 Revision
June 10, 1999 D3370-95AR99E01 Revision
Not Available D3370-76 Revision
Sept. 10, 1995 D3370-95AR03E01 Reaffirmation